Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff7acb4329f094a…

MALICIOUS

PDF

44.5 KB Created: 2021-05-14 13:54:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 7684b8cc2f2a4e5944177d13541d1a21 SHA-1: 920f8a4790fc20931f464dc71a1df2cfee97dcc5 SHA-256: 2ff7acb4329f094acfa231555bcb5ae1de6a3f89e1acb9e9ace02341cfce2408
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs that redirect to malicious infrastructure, specifically promoting "free generator" and "game hack" lures. The ML classifier also flagged this PDF as malicious. The document body and embedded URLs suggest a phishing or scam attempt, likely to trick users into visiting malicious sites or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.xyz/app/406889139/2021-coin-master-hack-without-verification-game-hack In PDF document text
    • http://lksim.com/images/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://lksim.com/images/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • http://lksim.com/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://lksim.com/images/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://lksim.com/images/coin-and-spin_GM406889139.pdfIn PDF document text
    • http://lksim.com/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lksim.com/images/coin-master-ids-for-free-spins_GM406889139.pdfIn PDF document text
    • http://lksim.com/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lksim.com/images/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lksim.com/images/get-free-robux_GM431946152.pdfIn PDF document text
    • http://lksim.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lksim.com/images/free-robux-no-human-verification-or-survey-or-download_GM431946152.pdfIn PDF document text
    • http://lksim.com/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://lksim.com/images/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lksim.com/images/how-to-get-800-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lksim.com/images/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • http://lksim.com/images/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lksim.com/images/coin-master-hack-2021-no-survey_GM406889139.pdfIn PDF document text
    • http://lksim.com/images/coin-master-village-4_GM406889139.pdfIn PDF document text
    • http://lksim.com/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000484f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x484F 24424 bytes
SHA-256: 6a3daec56fd54c3cf66805a7153443f75bd243656fe302529d6405a66d8d5345
font_01_sfnt_off00008013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8013 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000089fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89FE 18756 bytes
SHA-256: 266fe18e484f269f7d4449b1961e8e27938f8ebf8550769785df41e810e08031

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